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GMP damaging Zen 5 CPUs?

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41–50 of 240 posts

Re: GMP damaging Zen 5 CPUs?

#41

Most likely it's the motherboard. ASRock is getting nailed right now for unstable XMP and CPU voltages (it's recommended to undervolt a little just in case). The Asus Prime B650M motherboards they are using aren't exactly high end.

And the close-up photos of the socket with pins are missing.

Re: GMP damaging Zen 5 CPUs?

#42
post #33

No actual die temperature measurements? That would seem a lot more relevant than the ambient temperature.

Die temperature readings aren't particularly helpful these days with desktop parts that will (depending on the power management settings) more or less keep increasing the clock speed until they reach ~90°C and just stay there. Upgrading from a bad/undersized heatsink can easily have only a tiny effect on temperature but have the effect of significantly increasing clock speed and power.

Re: GMP damaging Zen 5 CPUs?

#43
post #4

As there is ongoing drama with Zen 5 and power issues, there are people with the instruments and the motivation to investigate this. You should consider contacting Gamers Nexus, and help them to get your test suite running. They can measure power draw and do a thermal analysis of this CPU, and they'd likely be eager to do it, given the possibility of making a bunch of dramatic YouTube content about design flaws in wi…

> [...] a bunch of dramatic YouTube content [...]

That framing doesn't do him and the team justice. There is (or better, was) a 3.5h long story about NVIDIA GPUs finding their ways illegaly from the US to China, which got taken down by a malicious DMCA claim from Bloomberg. It is quite interesting to watch (Can be found archive.org).

GN is one of the last pro-consumer outlets, that keep on digging and shaking the tree big companys are sitting on.

Re: GMP damaging Zen 5 CPUs?

#44
post #19

> The so-called TDP of the Ryzen 9950X is 170W. The used heat sinks are specified to dissipate 165W, so that seems tight. TDP numbers are completely made up. They don’t correspond to watts of heat, or of anything at all! They’re just a marketing number. You can't use them to choose the right cooling system at all. https://gamersnexus.net/guides/3525-amd-ryzen-tdp-explained-...

Wow, I can't believe how BS this TDP is! I feel like a total idiot! I've always assumed it's sorta-kinda a tight upper bound on power consumption, perhaps with some allowance for "imperfections" in the dissipation properties of the CPU, and that I shouldn't sweat the details.

Couldn't this count as false/misleading advertizing though?

Re: GMP damaging Zen 5 CPUs?

#45
post #10

That looks like a combination of improperly mounting the heatsink and noctuna being wrong in their recommendation to offset it. I’d imagine for gaming cooling one side more makes sense but my completely uneducated guess is that GMP is working a different part of the CPU than gaming does.

I'd assume both GMP and any CPU intensive game just prefer the performance cores.

Re: GMP damaging Zen 5 CPUs?

#46
post #4

As there is ongoing drama with Zen 5 and power issues, there are people with the instruments and the motivation to investigate this. You should consider contacting Gamers Nexus, and help them to get your test suite running. They can measure power draw and do a thermal analysis of this CPU, and they'd likely be eager to do it, given the possibility of making a bunch of dramatic YouTube content about design flaws in wi…

> [...] a bunch of dramatic YouTube content [...] That framing doesn't do him and the team justice. There is (or better, was) a 3.5h long story about NVIDIA GPUs finding their ways illegaly from the US to China, which got taken down by a malicious DMCA claim from Bloomberg. It is quite interesting to watch (Can be found archive.org). GN is one of the last pro-consumer outlets, that keep on digging and shaking the tre…

For the record, I think GN is excellent and highly credible.

Re: GMP damaging Zen 5 CPUs?

#47

Most likely it's the motherboard. ASRock is getting nailed right now for unstable XMP and CPU voltages (it's recommended to undervolt a little just in case). The Asus Prime B650M motherboards they are using aren't exactly high end.

My friend just had an ASRock board cook his AMD CPU. Apparently a very common problem.

Re: GMP damaging Zen 5 CPUs?

#48

What is gmp?

Valid question i think in this context. I knew about GNU multiprecision library, but thought that couldnt be it, as it's "just" a highly optimized low level bit fiddling lib (at least thats my expectation without looking into the source), so it's strange why it could be damaging Hardware ...

Re: GMP damaging Zen 5 CPUs?

#49
post #19

> The so-called TDP of the Ryzen 9950X is 170W. The used heat sinks are specified to dissipate 165W, so that seems tight. TDP numbers are completely made up. They don’t correspond to watts of heat, or of anything at all! They’re just a marketing number. You can't use them to choose the right cooling system at all. https://gamersnexus.net/guides/3525-amd-ryzen-tdp-explained-...

Wow, I can't believe how BS this TDP is! I feel like a total idiot! I've always assumed it's sorta-kinda a tight upper bound on power consumption, perhaps with some allowance for "imperfections" in the dissipation properties of the CPU, and that I shouldn't sweat the details. Couldn't this count as false/misleading advertizing though?

Its pretty insane to see someone say something like: “TDP is about thermal watts, not electrical watts. These are not the same.” Watts are watts.

But yeah, TDP means nothing. If you stick plenty of cooling and run the right motherboard board revision your "TDP" can be whatever you want it to be until the thing melts.

Re: GMP damaging Zen 5 CPUs?

#50
post #19

> The so-called TDP of the Ryzen 9950X is 170W. The used heat sinks are specified to dissipate 165W, so that seems tight. TDP numbers are completely made up. They don’t correspond to watts of heat, or of anything at all! They’re just a marketing number. You can't use them to choose the right cooling system at all. https://gamersnexus.net/guides/3525-amd-ryzen-tdp-explained-...

Wow, I can't believe how BS this TDP is! I feel like a total idiot! I've always assumed it's sorta-kinda a tight upper bound on power consumption, perhaps with some allowance for "imperfections" in the dissipation properties of the CPU, and that I shouldn't sweat the details. Couldn't this count as false/misleading advertizing though?

It's thermal design power, ie. it's the power that it's designed for, not absolute max.
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